Sectional chip breaker for planing machines



March 1,1927. 1,619,008

c. G. 'WILDERSON SECTIONAL CHIP BREAKER FOR PLANING MACHINES Filed Jan. 22. 1925 5' T. zif Patented Mar. 1, 1927.

time sr'rss PATENT OFFICE.

CLINTON G. WILDERSQN, OF L EETONIA, GHIO, ASSIGNOR TO THE CRESCENT MACHINE COMPANY, OF LEETON ZA, 02110,. A. CQRPORATION OF OHIO.

SECTIONAL CHIP BREAKERF FOR PLANING MACHINES.

Application filed. January The present invention relates to sectional chip breakers for wood planing machines and has for its object to provide an improved construction of this character.

In the accompanying drawings Figure 1 is a plan view of a chip breaker embodying a preferred form of my invention;

Figure 2 is a front elevation of the chip breaker shown in Figure 1; and

Figure 3 is a sectional view on the line III-J11 of Figure 1, the cutter head and feed roll being indicated diagrammatically by circles 2 and 3.

Referring to the illustrated embodiment of the invention, 4 designates arms which are adapted to be pivoted to the frame of a planing machine by means extending through openings 5 in one end of the arms.

A guide bar 6 is secured at its ends to one end of the arms 4 by means of screws 7. These screws also serve to secure to the arm 4 and arms 8 which carry set screws 9 held in adjusted position by lock nuts 10. These set screws are adapted to cooperate with the frame of the planing machine for limiting downward movement of the chip breaker.

The guide bar 6 is of uniform width and thickness and has a plurality of presser feet 11 mounted thereon. Each presser foot has its upper portion bifurcated to receive the guide bar, the slot 12 in each presser foot being of slightly greater depth than the width of the uide bar whereby the presser feet are adapted to have a limited Vertical sliding movement on the guide bar as will be hereinafter apparent. The walls of each slot 12 form bearing surfaces 13 for engaging the opposite sides of the bar adjacent its upper and lower longitudinal edges and clearance spaces 14 intermediate such bearing surfaces.

A plate 15 is detachably secured to the upper bifurcated end of each presser foot by screws 16. These plates extend across the upper edge of the guide bar and serve to retain the presser feet on the guide bar. A stem 17 having both end portions screwthreaded extends through each plate 15 and is screwed into the upper edge portion of the guide bar. A thumb nut 18 is mounted on the upper screw-threaded end portion of each stem and a coil spring 19 surrounds the stem between the nut and corresponding plate.

It will be apparent that with this construc- 22, 1925. Serial N0. 4,019.

tion the coil springs 19 normally maintain the presser feet at the lower limit of their movement on the guide bar but permit them to yield vertically individually. By adjusting the thumb nuts 18 the springs 19 may be given any desired intitial tension.

Extending between the arms 4 and secured to -ribs 2O thereon by bolts 21' is a curved metal shield 22 which extends over the cutter head and is adapted to catch chips which are thrown upwardly by thecutter head.

While I have Shown and described a preferred embodiment of my invention it will be understood that the invention is not limited to the exact details of construction shown as changes may be made therein within the scope of the appended claims without departing from the spirit of the invention.

1 claim:

1. A chip breaker for planing machines, comprising a guide bar, a plurality of presser feet mounted on said bar, each of said presser feet having its upper port-ion bifurcated to straddle said bar, the width of the bar being less than the depth of the slot in each presser foot, a plate detachably secured to the upper bifurcated end of each presser foot and extending across the slot therein, a stem extending through each plate and having its lower end secured in the upper edge portion of the guide bar and its upper end screw-threaded, a nut mounted on the screw-threaded upper end of each. stem, and a coil spring surrounding each stem between its nut and the corresponding plate substantially as described.

2. A chip breaker for planing machines, comprising a guide bar, a plurality of presser feet mounted on said bar, each of said presser feet having its upper portion bifurcated to straddle said bar, the width of the bar being less than the depth of the slot in each presser foot and the walls of each such slot forming bearing surfaces for engaging the opposite sides of the bar adjacent its upper and lower longitudinal edges and clearance spaces intermediate said hearing surfaces, a plate detachably secured to the upper bifurcated end of each presser foot and extending across the slot therein, a stem extending through each plate and having its lower end secured in the upper edge portion of the guide bar and its upper end screw-threaded, a nut secured on the screw-threaded upper end of each stem, and a coil spring surrounding each stern between its nut and corresponding plate.

3. A chip breaker for planing machines, comprising a guide bar, a pair of arms extending from the opposite ends of said bar and adapted to be pivoted to the frame of a planing machine, a plurality-of presser feet mounted on said bar for limited vertical movement thereon, spring means associated with each presser foot tending to force the same downwardly on said bar, and a shield extending between said arms and secured at its ends thereto, said shield be ing arranged to catch chips thrown upwardly by the cutter head, substantially as described. I

4. A sectional chip breaker for planing machines, including a flat sided supporting bar, a plurality of presser feet having bifurcated extensions straddling the flat sided bar and having a bearing on each face thereof, a removable means on each bifurcated extension for retaining the several presser feet on the bar and permitting vertical movement thereof, and resilient means \for urging each of the presser feet down, substantially as described.

5. A sectional chip breaker for planing machines, including a flat sided supporting bar, an arm at each end of the bar by means of which the bar is supported on a planing machine, adjustable stop elements on one of the arms for limiting the downward swing thereof, a plurality of presser feet having bifurcated extensions straddling the flat sided bar and having a bearing on each face of the bar, a removable means on each bifurcated extension for retaining the several presser feet on the bar and permitting vertical movement thereof, and resilient means for urging each of the'presser feet down.

In testimony whereof my hand.

CLINTON Gr. VVILDERSON.

I have hereunto set 

